HOME >> BIOLOGY >> NEWS
Marine reserves can't do it all: Sea otters vs. red abalone

California's sea otters and red abalone fisheries both need help -- but what's the best way to protect predators as well as their prey? New research suggests that the answer is separate reserves.

"We conclude that coastal marine protected areas off California cannot enhance abalone fisheries if...they also contain sea otters, " say Samantha Fanshawe, who did this work while at the University of California at Santa Cruz, and is now at the U.K.'s Marine Conservation Society; Glenn VanBlaricom of the University of Washington in Seattle; and Alice Shelly of TerraStat Consulting Group in Seattle, Washington, in the February issue of Conservation Biology.

California's red abalone population is so low that all of the commercial fisheries and all but one of the recreational fisheries are closed. Similarly, California's sea otter population is at roughly 2,000 and is dropping by about 1-2% each year. While the state has two marine reserves that protect the otters from people, there are none that protect the abalone from otters.

To see if reserves can both protect the sea otters and rebuild the red abalone fisheries, Fanshawe and her colleagues studied red abalone at six sites, four with and two without sea otters. The sites with otters were off Monterey County and the sites without otters were off Sonoma County; abalone harvesting is prohibited at all six of the sites. The researchers determined the abundance and size of red abalone at two depth zones: "shallow" (about 10-15 feet) and "deep" (about 25-33 feet). Sea otters can dive as deep as 330 feet and so can easily reach abalone on both zones.

Fanshawe and her colleagues found that red abalone were far more abundant at the sites without sea otters: there were about seven times more of the abalone in the "deep" zones (15.6 vs. 2.2 per study plot), and nearly 20 times more in the "shallow" zones (17.5 vs. 0.9 per study plot). In addition, the abalone were an average of nearly two times bigge
'"/>

Contact: Samantha Fanshawe
sam@mcsuk.org
44-198-956-6017
Society for Conservation Biology
28-Jan-2003


Page: 1 2

Related biology news :

1. Hopkins Marine Station honored by the American Society for Microbiology
2. Marine disease on the rise?
3. Five Marine Conservation leaders receive worlds top award from Pew Institute for Ocean Science
4. Marine sponges provide model for nanoscale materials production
5. Marine scientists discover nutrient pollution boosts fungi, bacteria killing Caribbean reefs
6. Marine pathogens spread much faster than their terrestrial counterparts
7. How many fish in the sea? Census of Marine Life launches first report
8. Marine biologists probe black box mysteries of the sea
9. Marine biodiversity essential to preserving species
10. Marine researchers explore sediment highways
11. Marine methane consumed by consortia of bacteria

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/26/2020)... ... August 24, 2020 , ... Elgia Therapeutics , ... fibrotic diseases, today announced that Dr. Stacie Canan has joined the company as ... previously served as Executive Director of Global Health at Bristol Myers Squibb (formerly ...
(Date:8/23/2020)... , ... August 21, 2020 , ... ... Corporation has been published and is now available on the company’s global ... diffraction—serves the X-ray analysis community, presenting current news and crystallographic research. , ...
(Date:8/21/2020)... ... August 20, 2020 , ... NDA ... , a Clinical Operations executive with expertise in clinical trial planning and feasibility, ... as an Expert Consultant. Throughout his career, Mr. Movahhed has helped design and ...
Breaking Biology News(10 mins):
(Date:7/18/2020)... TORONTO (PRWEB) , ... July 16, 2020 , ... After ... begins. The completion of a great surgery is only the beginning of a successful ... the research community. , Join Brad Gien, Global Head of Surgery from Envigo ...
(Date:7/10/2020)... ... July 09, 2020 , ... PathSensors Inc., ... has expanded the company’s exclusive license to include clinical applications for CANARY™ ... market, focusing initially on the SARS-CoV-2 biosensor. CANARY’s™ fast and highly ...
(Date:7/1/2020)... ... June 29, 2020 , ... MedShift , ... in 2020, despite many obstacles created as a result of COVID-19. As a ... its partnered medical practices and medical manufacturers by expanding access to device offerings, ...
(Date:6/28/2020)... ROCKY HILL, Conn. (PRWEB) , ... June 25, ... ... systems company formed to advance photodynamic therapy for treating cancer, today announced the ... Buffalo, New York (“Roswell Park”). The agreement provides Lumeda globally exclusive rights ...
Breaking Biology Technology:
Cached News: